With the Golden State Warriors about to tip off in the NBA Finals for the first time in 40 years, league officials are warning fans to be on the lookout for low-quality counterfeit merchandise.

Since 1992, anti-counterfeiting officials representing the major sports leagues have aided in the seizure of almost 11 million pieces of knockoff merchandise, valued at almost half a billion dollars. Officials have shut down more than 2,900 websites selling fake merchandise.

Officials say fans should use the following checklist to avoid paying big bucks for counterfeit gear:

Look for the hologram sticker or holographic hangtag.

Look for a sewn-in or screen-printed label identifying the name of the NBA licensee (e.g., adidas, ’47 Brand, Stance, Mitchell & Ness, etc.) that has been authorized by the NBA to produce “genuine” or “official” apparel products.

Make sure player and team names are spelled correctly.

Check for irregular markings.

Make sure product tags and labels are intact and not ripped.

Make sure current NBA branding is displayed.

Make sure accurate team colors are being used.

Check for high quality embroidery.

Look for screen printing that is not worn or cracked.

Purchase merchandise from NBA-authorized retail locations, the Cleveland Cavaliers Team Shop at Quicken Loans Arena, the Golden State Warriors Team Store at Oracle Arena and NBAStore.com.